By certification 
* Digital display gives exact reading with no guessing or errors; Wide measuring range and high resolution.
* Automatic stop flashing to save electricity and improve flash tube lifetime.
* Internal / external triggering fast conversion; x2 and ÷2 button for fast adjustment.
* Use photoelectric signal while external triggering, achieve automatic tracking function of the pattern.
* Use microcomputer technology, emerging technologies, anti-jamming technique and other advanced technology, it can measure the rotative velocity without contacting the object.
* Automatic stop flashing to save electricity and improve flash tube lifetime.
* Internal / external triggering fast conversion; x2 and ÷2 button for fast adjustment.
* Use photoelectric signal while external triggering, achieve automatic tracking function of the pattern.
* Use microcomputer technology, emerging technologies, anti-jamming technique and other advanced technology, it can measure the rotative velocity without contacting the object.
